Resources Contact Us Home
Control system for permanent magnet synchronous motor

Image Number 14 for United States Patent #5854547.

To provide a control system for a permanent magnet synchronous motor which can ensure stability of the current control system, even if the revolution frequency of the motor becomes higher and the terminal voltage of the motor exceeds the inverter maximum output voltage. In this method, when the revolution frequency of the motor exceeds a specified value, the size of the voltage vector is made a specified voltage vector, and a modulation factor based on its value is obtained. At the same time, a magnetic flux direction current correction value is found based on the size of a voltage vector from a polarity coordinates conversion unit and the above specified voltage vector size. Then, the magnetic flux direction current instruction is corrected by that value.

  Recently Added Patents
Biomarker for Barrett's Oesophagus
Diaminocyclohexane compounds and uses thereof
Ascertaining presentation format based on device primary control determination
Method and system for billing based on color component histograms
Systems and methods for analyzing telecommunications invoices for payment
Methods and systems for use in tracking targets for direction finding systems
Calcium carbonate granulation
  Randomly Featured Patents
Submicron thin film inductive head with self-aligned staggered pole-tips
Apparatus and method of discovering neighbor cell
Semiconductor device and method for making thereof
Child-resistant, toggle-action closure
Process for the manufacture of acetic acid ethyl ester
Electrical devices
Liquid automatic dishwashing composition with glassware protection
Multifunctional web rotary module
Method for forming a multi-layer planarization structure
Slide fastener